I have 4 Drives, 2 external, 2 internal 90% of the time when i am copying videos from 1 drive to another my computer struggles immensly, it isnt exactly fast but it opk and also if i try to move more than 1 file at a time it freezes and causes my entire computer to crash. very rarely though its fine and i can move 100's of GB of data easily it makes no sense! please help.
Have you used a utility such as "DiskCheckup" to check the status of the drives' "SMART" error counters? I'm wondering if your drives are struggling to correct errors. If the SMART counters show "pending" or "reallocated" sectors, and especially if those numbers increase when you have your problems, then you've probably got a drive issue and it might be wise to replace it.
yes they are all SATA drives, i have now run hitachi's DFT andvanced test on the problem drive, which gave a result of 0x00 however whenever i try to move files to or from the drive i recieve a device I/O error and this code 0x8007045D